How to Update a Specific Index from the Array in Firestore

Is there any way to update a specific index from the array in Firestore

Is there any way to update a specific index from the array in Firestore?

No, there is not! This is not possible because if you want to perform an update, you need to know the index of that particular element. When talking about Cloud Firestore arrays, the things are different that you might think.

Because we are creating apps that can be used in a multi user environment, try to think what might happen if a user wants to edit a value at index 0, some other user wants to delete the value at index 0 and in the same time some other user might want to add another item at index 0. For sure, you'll end up having very different results and why not, get even array out of bounds exception. So Firestore actions with arrays are a little bit different. So you cannot perform actions like, insert, update or delete at a specific index.

If those two methods do not help you enough, you should get the entire document, get the array, modify it and add it back to the database.

How can I update an object inside of an array in firestore?

Firestore does not have an operation that allows you to update an existing item in an array by its index.

To update an existing item in the array, you will need to:

1. Read the entire document into your application.
2. Modify the item in the array in your application code.
3. Write back the entire array to the document.

I'm pretty sure this has been asked before, so let me see if there's an answer with an example.

Also see:

• How to remove an array element according to an especific key number?
• Simple task list ordering - how to save it to Firebase Firestore?
• How to update only a single value in an array
• How to update an "array of objects" with Firestore?

Update the Map data of an Array inside Firestore - Flutter

Firestore does not provide a way to update an array element at an index. You have to read the entire document, modify the array in memory, then write the entire array back to the document.

Flutter: Update specific index in list (Firestore)

For all client languages and platforms, it's currently not possibly to issue a single command to update an array item by index. There is no special syntax for that. What you will need to do instead is read the document, modify the field array data in the way that you want, and update that field back to the document, in its entirety. You can do this in a transaction if you want the update to be atomic.

See also:

• Is there any way to update a specific index from the array in Firestore
• Firestore Update single item in an array field
• How to update an array item in Firestore
• How to update an "array of objects" with Firestore?

Firebase: How do I update value in array instead of adding new element in Firestore?

You need to read the Array, modify it in your front-end and write it back to Firestore (i.e. update the document by passing the entire modified array).

Trying to only update the specific array in Firestore but what it does is add more data in the array

There is no way to update an item in an array field with either arrayUnion or otherwise. You'll have to:

1. Read the document into your application
2. Get the full array
3. Update the one item in the array
4. Write the full array back to the document

Also see:

• Firestore Update single item in an array field
• Cloud firestore: Update field values in nested array object with dot notation
• How can I update an object inside of an array in firestore?

how can i add value to specific index in firstore ListField value

There is no way you can update an element that exists in an array by its index. This means you’ll need to:

• Read the content of the array into your application code.
• Update the element in the array using the desired index.
• Write the entire array back to Firestore.

This resource might also help.

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